When April Fools' Day pranks go disastrously wrong

A humorous local news report about the "volcanic eruption" of a 635-foot hill in Milton, Massachusetts, backfired dramatically on April Fool's Day 1980 after local residents failed to watch the bulletin to its end (at which point a sign revealing that the report was a prank was held up). Panicked viewers began ringing the police and attempting to leave their homes, and the TV producer behind the prank was later fired.